CN106329123A - Nulling method of closed-loop nulling antenna for suppressing different forms of interference - Google Patents
Nulling method of closed-loop nulling antenna for suppressing different forms of interference Download PDFInfo
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- CN106329123A CN106329123A CN201610696560.4A CN201610696560A CN106329123A CN 106329123 A CN106329123 A CN 106329123A CN 201610696560 A CN201610696560 A CN 201610696560A CN 106329123 A CN106329123 A CN 106329123A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
- H01Q3/2611—Means for null steering; Adaptive interference nulling
Abstract
The invention provides a nulling method of a closed-loop nulling antenna for suppressing different forms of interference. By a power detection closed-loop nulling scheme, a processing method of collecting interference signals for multiple times and carrying out weighted average is provided to obtain stable interference detection power, so that the insensitive characteristic of a system on the forms of interference sources is achieved. Meanwhile, a diversity technology of an LMS nulling algorithm of coarse and fine step length combination and adaptive step length iteration and an adaptive screening nulling algorithm is provided in the nulling process to achieve effective suppression of different forms of interference sources of single-carrier interference, sweeping frequency interference, blinking interference, jump interference and the like, so that the nulling method has wide applicability and popularization and application value.
Description
Technical field
The invention belongs to the communications field, relate to the control method of a kind of smart antenna.
Background technology
Nulling antenna is a kind of smart antenna for suppressing interference, and it obtains each radiating element by nulling algorithm and swashs
The amplitude encouraged and phase place, and realize the reconstruct of antenna radiation pattern on this basis so that the antenna radiation pattern after reconstruct is in interference
Produce zero point at source, and then reach the purpose of suppression interference.
It is said that in general, Nulling antenna has open loop, two kinds of zeroing modes of closed loop.Wherein:
Open loop approach: first have to carry out position of interference source disturbing direction finding, then pass through nulling algorithm according to direction finding result
Obtain the weights that return to zero, and zeroing weights are injected into zeroing phase shifter of passage and attenuator to realize the weight of antenna radiation pattern
Structure, forms zeroing wave beam.Open loop approach typically exchanges zero passage amplitude, phase equalization requires higher, it usually needs corresponding
Assisted calibration antenna keeps the return to zero width of passage, consistent property, and system composition is more complicated.
Closed-loop fashion: require no knowledge about interference arrival bearing, to interference by the way of feedback circuit weight iteration
Return to zero in source, until the intensity of incoming wave drops to the level that system can be stood.Closed-loop fashion is to passage width, the requirement of consistent property
The highest, but closed-loop fashion needs whether interference signal is detected in real time to judge to disturb and be suppressed, when interference signal with
When frequency, time or space Rapid Variable Design (such as Sweeping nonlinearity, flicker interference, saltus step interference), will exist interference signal without
Method capture or the situation of capture instability, and then cause returning to zero unsuccessfully, therefore obtaining stable interferer signal detection ability is to close
The key of ring mode.
Summary of the invention
Present invention solves the technical problem that and be: overcome the deficiencies in the prior art, provide one for closed loop Nulling antenna
Can be used for suppressing the adjusting zero method of multi-form interference, real by the way of to interference signal multi collect, weighting, average treatment
The now insensitive characteristic to interference source form, use step-length thick, smart to combine and the LMS nulling algorithm of adaptive step iteration and
The diversity technique of self adaptation investigation nulling algorithm realizes differences such as single carrier interference, Sweeping nonlinearity, flicker interference, saltus step interference
Effective suppression of form interference source.
The technical solution of the present invention is: the zeroing side of a kind of closed loop Nulling antenna for suppressing multi-form to disturb
Method, comprises the steps:
(1) arranging zeroing parameter, start threshold level Ps including synthesis wave beam zeroing, synthesis wave beam zeroing terminates thresholding electricity
Flat Pe, beamlet interference detection threshold level Pz, thick step-length zeroing range value Am1 and phase value Ph1, essence step-length zeroing range value
Am2 and phase value Ph2, Am2 < Am1, Ph2 < Ph1, thick step-length zeroing iterations Ns, total iterations Nmax, step size doubles
Number Nt, convergence precision △ P；
(2) whether the composite wave beam power detection level value of judgement Nulling antenna is more than Ps, if it exceeds then proceed to zeroing
Pattern, enters step (3)；Without exceeding the composite wave beam power detection level value then keeping monitoring Nulling antenna with Ps's
Relation；
(3) selecting zeroing mode, if LMS zeroing, then antithetical phrase beam interference detects, and selects more than all sons of Pz
Wave beam returns to zero, and enters step (4)；If investigation zeroing, then the beamlet selecting beamlet Interference Detection level maximum is entered
Row zeroing, enters step (5)；
(4) attenuator of beamlet passage to all participation LMS zeroing carries out amount of decrease degree Am successively, the phase shifter subtracts
Phase place Ph or add the weights change of phase place Ph, wherein before and after phase shifter phase place, twice change needs contrary, store each amplitude and
Conjunction beam power after phase place change detects level and calculates current iteration minimum conjunction beam power detection level Pmin, deposits simultaneously
The weights that storage Pmin is corresponding；
Then Pmin is compared with the current minimum beam power detection level Pmin0 and convergence precision △ P that closes:
As Pmin0-Pmin > △ P time, update Pmin0=Pmin, and weights corresponding for Pmin passed to corresponding controlled shifting
Phase attenuator, carries out next iteration；
As 0 < Pmin0-Pmin≤△ P, zeroing range value and zeroing phase value are doubled simultaneously, and judges step-length
Double whether number of times is more than Nt, if no more than Nt, then use the zeroing range value after doubling and zeroing phase value to re-start repeatedly
In generation, if more than Nt, then updating Pmin0=Pmin, and weights corresponding for Pmin passed to corresponding controlled phase shift attenuator, carry out
Next iteration；
When Pmin0-Pmin≤0, shielding obtains beamlet corresponding during Pmin, selects the power that current iteration second is little
The weights that level is corresponding are assigned to controlled phase shift attenuator, and judge the son whether the beamlet number shielded returns to zero more than participation
Wave beam number, if beyond, closing the passage at the beamlet place shielded, utilizing remaining channel to re-start zeroing, if not having
Exceed, then enter next iteration；
After single iteration completes, current minimum beam power detection level Pmin0 with Pe that close is compared, works as Pmin0
During>=Pe, iterations increase once, enters next iteration, and as Pmin0,<during Pe, zeroing terminates, and keeps current state；
Before entering iteration, first determine whether the magnitude relationship of current iteration times N u and Nmax, Ns, as Nu≤Ns every time
Time, use thick step-length zeroing range value Am1 and phase value Ph1 to be iterated, when Ns < during Nu≤Nmax, uses essence step-length zeroing
Range value Am2 and phase value Ph2 is iterated, as Nu > Nmax time, zeroing terminates；
(5) the Nulling antenna area of coverage is separated into different interference position points, and each interference position that will have optimized in advance
Put a corresponding best weight value to store according to the packet of beamlet distribution situation, then to each dry in the beamlet being disturbed maximum
Disturb position and carry out interference investigation one by one, by the weights of interference position corresponding in this beamlet are put to zeroing passage corresponding one by one
Controlled phase shift attenuator, store each composite wave beam power detection level, record synthesis wave beam minimum power detection level
Pmin0 and now corresponding weights, compare Pmin0 and Pe afterwards, and as Pmin0, < during Pe, zeroing terminates, and enters and keeps
Pattern；As Pmin0 >=Pe, close the beamlet passage participating in zeroing, select remaining channel to re-start zeroing.
Described composite wave beam power detection level is by gathering the effective power level P after also weighted average for Nc timea,The interference signal that wherein Nc time gathers is P1…PNc, PiFor i & lt interferer signal detection value.
Packet storage approach in described step (5) is as follows: calculate the friendship of the beamlet after considering Beam steering error δ °
Folded level, and calculate the beam angle w of beamlet corresponding to this overlapping level, all dry by the beamlet width w area of coverage
The weights disturbing a position are assigned in this beamlet.
Described Am2=1dB, Am1=0.5dB, Ph2=25 °, Ph1=5 °.
Present invention advantage compared with prior art is:
(1) the inventive method is for the interference source situation of multi-form, proposes interference signal multi collect (times of collection
Can artificially arrange) and the method that processes of weighted average obtain stable detection performance, it is achieved that system is to interference source form not
Sensitivity characteristic；
(2) step-length thick, smart that the present invention proposes combines and the LMS nulling algorithm of adaptive step iteration returns to zero with investigation
Algorithm diversity method, improves function and the motility of system, wherein the step-length thick, smart in LMS zeroing combine and step-length from
Adapt to iteration weights iterative manner, convergence of algorithm speed can be improved on the basis of ensureing zeroing performance, shorten zeroing
Time.And investigate adjusting zero method without weights being carried out real-time Optimized Iterative, zero deep performance does not relies on jamming-to-signal ratio, for list
During individual interference source, use investigation adjusting zero method, it is possible to obtain more preferable zero deep performance and wave beam conformal nature.
Accompanying drawing explanation
Fig. 1 is the theory of constitution block diagram of Nulling antenna；
Fig. 2 is the flow chart of the inventive method.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
One, Nulling antenna composition
As it is shown in figure 1, Nulling antenna includes: N number of radiating element 1, N number of input preselector 2, N number of low noise phase shift decay
Assembly 3, beam forming network 4, composite wave bundle coupler 5,1 × N microwave switching matrix 6, beamlet disturbance ecology receiver 7,
Closing beam interference identification receiver 8, zeroing controller 9, wherein low noise phase shift damping assemblies 3 comprises again low-noise amplifier
10, beamlet bonder 11, controllable attenuator 12, controllable phase shifter 13, wherein N is positive integer.
Two, Nulling antenna operation principle and mode of operation
Nulling antenna operation principle: signal enters low after N number of radiating element 1 receives and N number of input preselector 2 filters
Noise amplifier 10 is amplified, and signal is divided into two-way afterwards, wherein:
One tunnel enters wave beam through the straight-through port of beamlet bonder 11 and controllable attenuator 12 and controllable phase shifter 13
Synthesis network 4 synthesizes, and the signal after synthesis enters through composite wave bundle coupler 5 coupling port and closes beam interference identification
Receiver 8 carries out detection, and this road signal is referred to as closing road signal, is used for reflecting conjunction wave beam detection information, it is judged that close whether wave beam is subject to
To interference, and whether interference is suppressed, when conjunction wave beam power-level detector starts threshold level more than the conjunction wave beam zeroing arranged,
Think and be interfered, on the contrary think be not interfered or disturb the most suppressed.
Another road enters 1 × N microwave switching matrix 6 through the coupling port of beamlet bonder 11, enters wavelet afterwards
Bundle disturbance ecology receiver 7 carries out detection, and this road signal is referred to as beamlet signal, is used for reflecting beamlet detection information, it is judged that
Whether the beamlet and the interference that are interfered disappear.When beamlet power-level detector is more than the unified sub-road interference threshold arranged
During level (N number of all the same), it is believed that this way wave beam is interfered, otherwise thinks that this way wave beam is not interfered or this road
Interference in beamlet disappears.
The mode of operation of Nulling antenna includes initial pattern, zeroing mode, holding pattern and artificial mode.
Initial pattern: the attenuation of controllable attenuator 12 and the amount of phase shift of controllable phase shifter 13 are original state, antenna closes
Beam pattern is directional diagram static before zeroing, and zeroing controller 9 is constantly to from the detection closing beam interference identification receiver 8
Signal is acquired processing and disturbance ecology, if detection exists interference, mode of operation enters zeroing mode, otherwise mode of operation is still
For initial pattern.
Zeroing mode: first the controller 9 that returns to zero after entering zeroing mode controls 1 × N microwave switching matrix and switch over, complete
The disturbance ecology of the paired beamlet rectified signal from beamlet disturbance ecology receiver 7, it is judged that the beamlet being interfered,
The beamlet that zeroing controller 9 starts nulling algorithm and selection is interfered afterwards participates in zeroing.Zeroing controller 9 is by zeroing
The attenuation of the controllable attenuator 12 of the beamlet respective channel that algorithm iteration optimization is interfered and the shifting of controllable phase shifter 13
Phasor, is reconstructed with real-time involutory beam pattern so that directional diagram forms zero point in interference position and suppresses interference, works as conjunction
Wave beam detector signal level is less than when closing wave beam zeroing end threshold level, it is believed that interference is suppressed, and enters holding pattern, otherwise
Think that interference is not suppressed, carry out artificial mode.
Holding pattern: after entering holding pattern, the attenuation of controllable attenuator 12 and the amount of phase shift of controllable phase shifter 13 stop
Change, remains the state after iteration optimization, and now the zeroing the most real-time involutory wave beam rectified signal of controller 9 carries out interference knowledge
Not, if new interference being detected, being then again introduced into zeroing mode, if being not detected by interference, the most still keeping pattern.Keep mould
The controller 9 timing controlled 1 × N microwave switching matrix 6 that returns to zero under formula switches and beamlet rectified signal is carried out disturbance ecology, if sub
Wave beam remains to interference be detected, it is believed that interference does not disappear, and mode of operation is still that holding pattern is (when closing wave beam and interference being detected
Just enter zeroing mode, and after entering holding pattern, be intended to keep current channel weights, formed have the directional diagram of zero point come right
Interference suppresses, it is noted that now interference is suppressed and does not disappear, and disturbing disappearance is to be entered by beamlet Interference Detection
Row judges, if beamlet remains to interference be detected, illustrates that interference does not disappear, and interference is carried out by the weights needing to keep current
Suppression, if beamlet can't detect interference, illustrates that interference disappears, then passage weights return to the front original state that returns to zero).If it is sub
Wave beam can't detect interference, then it is assumed that interference disappears, and mode of operation carries out initial pattern.
Artificial mode: the replacement of zero-setting system parameter, the replacement of Interference Detection number of times is the most in a manual mode by instruction
Injection mode realizes, and artificial mode has limit priority, can not carry out instruction and inject amendment zeroing parameter under other pattern.
Three, nulling algorithm
Adaptive LMS nulling algorithm becomes with the attenuation of controllable attenuator 12 and the amount of phase shift of controllable phase shifter 13 for optimizing
Amount, by the adjustment of feedback branch weight, progressively obtains best weight value, to minimize in received signal power due to interference
That a part of power that signal exists and increases is optimization aim, affects the power of useful signal as small as possible simultaneously.Its power
Value iterative formula is as follows:
In formulaRepresent and cause due to the change of a certain weights (attenuation or phase-shift phase) reception power
Big reduction:
Δ W in formulanRepresentCorresponding weights change step, uses in LMS nulling algorithm weights iterative process
Slightly, essence step-length combine and adaptive step adjust step iteration mode to improve algorithm the convergence speed, shorten the zeroing time,
LMS nulling algorithm flow process is as follows:
(1) attenuator of beamlet passage to all participation LMS zeroing carries out amount of decrease degree Am successively, the phase shifter subtracts
Phase place Ph or add weights change (can add first and can subtract, must be the most contrary with front during subsequent operation) of phase place Ph, and stores
Conjunction beam power after amplitude and phase place change every time detects level and calculates current iteration minimum conjunction beam power detection level
Pmin, the weights that storage Pmin is corresponding；
(2) current iteration minimum is closed beam power detection level Pmin and is closed beam power detection level with current minimum
Pmin0 (initial value is the detection level value after entering zeroing mode) and convergence precision △ P compares；
As Pmin0-Pmin > △ P time, it is believed that current iteration is restrained, and updates and current minimum closes beam power detection level
Pmin0=Pmin, and weights corresponding for Pmin are passed to controllable attenuator 12, controllable phase shifter 13, carry out next iteration；
As 0 < Pmin0-Pmin≤△ P, it is believed that current iteration convergence rate is relatively slow, step-length (amplitude and phase place are simultaneously) is entered
Row doubles, and judges that step size doubles number of times, whether beyond setting value Nt, if without departing from Nt, then returns step (1), and employing doubles
After step-length re-start iteration, if beyond Nt, then update the current minimum beam power detection level Pmin0=Pmin that closes, and
Weights corresponding for Pmin are passed to controllable attenuator 12, controllable phase shifter 13, enters next iteration；
When Pmin0-Pmin≤0, current iteration dissipates, and shielding obtains beamlet corresponding during Pmin, selects this repeatedly
The weights that generation Minimum Power Level is corresponding are assigned to controllable attenuator 12, controllable phase shifter 13, and judge the beamlet shielded
The beamlet number whether number returns to zero beyond (being more than) participation, if exceeding, then judges that zeroing does not restrain, and exits zeroing mode
Carry out artificial mode (closing the passage at the beamlet place shielded, utilize remaining channel to reenter step (1)), if not having
Exceed, then enter next iteration；
(3), after current iteration completes, current minimum conjunction beam power detection level Pmin0 is terminated thresholding Pe with zeroing and enters
Row compares, and as Pmin0>=Pe, iterations increase once, enters next iteration, and as Pmin0,<during Pe, zeroing terminates, and enters
Enter holding pattern, keep current state；
(4), before entering next iteration, first determine whether that current iteration times N u, total iterations Nmax (set in advance
Fixed) and the magnitude relationship of big step iteration times N s (presetting, meet Ns < Nmax).As Nu≤Ns, step-length uses
Thick step-length (Am1, Ph1) is iterated, when Ns<during Nu≤Nmax, step-length uses essence step-length (Am2, Ph2) to be iterated, and works as Nu>
During Nmax, zeroing is exited.
Here Am2 < Am1, Ph2 < Ph1 it is required to meet.Generally, four numbers choose Am2=1dB, Am1=0.5dB, Ph2=
25 °, Ph1=5 ° just can meet daily job requirement.
Self adaptation investigation nulling algorithm is that the area of coverage is separated into several possible interference position points, and will optimize in advance
Good each best weight value corresponding to location point (after considering passage width phase measurement error) that may interfere with is distributed feelings according to beamlet
Condition packet is stored in zeroing controller 9, by obtaining best weight value, specifically to by the way of may interfere with location point packet investigation
Process is as follows:
After closing the detection discovery interference of beam interference identification receiver 8, first pass through and compare the reception of beamlet disturbance ecology
The size of each beamlet power level that machine 7 receives determines the beamlet being disturbed maximum, then in this beamlet
Interference position is carried out one by one interference investigation, by zeroing controller 9 by the weights of interference position corresponding in this beamlet by
One puts the controllable attenuator 12 corresponding to this beamlet place passage and controllable phase shifter 13, and stores conjunction after the change of each weights
Beam power detection level, record closes wave beam minimum power detection level Pmin0 and now corresponding weights, afterwards to
Little conjunction beam power detection level Pmin0 and zeroing terminate thresholding Pe and compare, and as Pmin0, < during Pe, zeroing terminates, and enters
Holding pattern, keeps current state, and as Pmin0 >=Pe, zeroing is exited, and enters artificial mode, closes the wavelet participating in zeroing
Beam passage, selects remaining channel to re-start zeroing.
In order to avoid area of coverage edge placement or beamlet overlapping region position noise spot occur omitting situation about looking in printing,
During discretization, each beamlet overlay area is carried out suitable extension, afterwards according to the beamlet after extension to likely doing
Disturbing location point to be grouped, method is as follows:
Calculate the overlapping level of the beamlet after considering Beam steering error δ °, and calculate the wavelet that this overlapping level is corresponding
The weights of all noise spot positions in the beamlet width w area of coverage are assigned in this beamlet by the beam angle w of bundle.
During LMS debugging, weights are combined by step-length thick, smart and adaptive step iterative manner obtains, during investigation zeroing,
Weights are the weights being previously stored, and are obtained by investigation in the beamlet being disturbed maximum.
It addition, stable Interference Detection signal is by increasing interference signals collecting number of times, and it is weighted, averagely
Processing method obtain, which realizes the system insensitive characteristic to interference source form.
Wherein interference signals collecting times N c can artificially be arranged, and the interference signal that Nc time gathers is P1…PNc, the most dry
Disturb power level PaObtain, i.e. by calculating the RMS value of the level that Nc gathersWherein PiDo for i & lt
Disturbing value detection signal, this effective power level all uses when closing beam interference power detection during whole zeroing.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (4)
1. the adjusting zero method of the closed loop Nulling antenna for suppressing multi-form to disturb, it is characterised in that include walking as follows
Rapid:
(1) arranging zeroing parameter, start threshold level Ps including synthesis wave beam zeroing, synthesis wave beam zeroing terminates threshold level
Pe, beamlet interference detection threshold level Pz, thick step-length zeroing range value Am1 and phase value Ph1, essence step-length zeroing range value
Am2 and phase value Ph2, Am2 < Am1, Ph2 < Ph1, thick step-length zeroing iterations Ns, total iterations Nmax, step size doubles
Number Nt, convergence precision △ P；
(2) whether the composite wave beam power detection level value of judgement Nulling antenna is more than Ps, if it exceeds then proceed to zeroing mode,
Enter step (3)；Without the relation exceeding composite wave beam power detection level value and the Ps then keeping monitoring Nulling antenna；
(3) selecting zeroing mode, if LMS zeroing, then antithetical phrase beam interference detects, and selects more than all beamlet of Pz
Return to zero, enter step (4)；If investigation zeroing, then the beamlet selecting beamlet Interference Detection level maximum is adjusted
Zero, enter step (5)；
(4) attenuator of beamlet passage to all participation LMS zeroing carries out amount of decrease degree Am successively, the phase shifter subtracts phase place
Ph or add the weights change of phase place Ph, wherein before and after phase shifter phase place, twice change needs contrary, store each amplitude and phase place
Conjunction beam power after change detects level and calculates current iteration minimum conjunction beam power detection level Pmin, stores simultaneously
The weights that Pmin is corresponding；
Then Pmin is compared with the current minimum beam power detection level Pmin0 and convergence precision △ P that closes:
As Pmin0-Pmin > △ P time, update Pmin0=Pmin, and weights corresponding for Pmin are passed to corresponding controlled phase shift decline
Subtract device, carry out next iteration；
As 0 < Pmin0-Pmin≤△ P, zeroing range value and zeroing phase value are doubled simultaneously, and judges step size doubles
Whether number of times is more than Nt, if no more than Nt, then uses the zeroing range value after doubling and zeroing phase value to re-start iteration, if
More than Nt, then update Pmin0=Pmin, and weights corresponding for Pmin are passed to corresponding controlled phase shift attenuator, carry out next
Secondary iteration；
When Pmin0-Pmin≤0, shielding obtains beamlet corresponding during Pmin, selects the power level that current iteration second is little
Corresponding weights are assigned to controlled phase shift attenuator, and judge the beamlet whether the beamlet number shielded returns to zero more than participation
Number, if beyond, close the passage at the beamlet place shielded, utilize remaining channel to re-start zeroing, if super
Go out, then enter next iteration；
After single iteration completes, current minimum beam power detection level Pmin0 with Pe that close is compared, as Pmin0 >=Pe
Time, iterations increase once, enters next iteration, and as Pmin0, < during Pe, zeroing terminates, and keeps current state；
Before entering iteration, first determine whether the magnitude relationship of current iteration times N u and Nmax, Ns every time, as Nu≤Ns,
Thick step-length zeroing range value Am1 and phase value Ph1 is used to be iterated, when Ns < during Nu≤Nmax, uses essence step-length zeroing amplitude
Value Am2 and phase value Ph2 are iterated, as Nu > Nmax time, zeroing terminates；
(5) the Nulling antenna area of coverage is separated into different interference position points, and each interference position point that will have optimized in advance
Corresponding best weight value is according to the packet storage of beamlet distribution situation, then to each interference position in the beamlet being disturbed maximum
Put and carry out interference investigation one by one, by the weights of interference position corresponding in this beamlet are put one by one to zeroing passage corresponding can
Control phase shift attenuator, store each composite wave beam power detection level, record synthesis wave beam minimum power detection level Pmin0 and
Now corresponding weights, compare Pmin0 and Pe afterwards, and as Pmin0, < during Pe, zeroing terminates, and enters holding pattern；When
During Pmin0 >=Pe, close the beamlet passage participating in zeroing, select remaining channel to re-start zeroing.
The adjusting zero method of a kind of closed loop Nulling antenna for suppressing multi-form to disturb the most according to claim 1, its
It is characterised by: described composite wave beam power detection level is by gathering the effective power level after also weighted average for Nc time
Pa,The interference signal that wherein Nc time gathers is P1…PNc, PiFor i & lt interferer signal detection value.
The adjusting zero method of a kind of closed loop Nulling antenna for suppressing multi-form to disturb the most according to claim 1 and 2,
It is characterized in that: the packet storage approach in described step (5) is as follows: calculate the beamlet after considering Beam steering error δ °
Overlapping level, and calculate the beam angle w of beamlet corresponding to this overlapping level, by owning in the beamlet width w area of coverage
The weights of noise spot position are assigned in this beamlet.
The adjusting zero method of a kind of closed loop Nulling antenna for suppressing multi-form to disturb the most according to claim 1 and 2,
It is characterized in that: described Am2=1dB, Am1=0.5dB, Ph2=25 °, Ph1=5 °.
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| CN113311397A (en) * | 2021-05-25 | 2021-08-27 | 西安电子科技大学 | Large array rapid self-adaptive anti-interference method based on convolutional neural network |
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| 叶建杰: "基于自适应调零天线的GPS抗干扰技术研究", 《西安电子科技大学硕士学位论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311397A (en) * | 2021-05-25 | 2021-08-27 | 西安电子科技大学 | Large array rapid self-adaptive anti-interference method based on convolutional neural network |
| CN113311397B (en) * | 2021-05-25 | 2023-03-10 | 西安电子科技大学 | Large array rapid self-adaptive anti-interference method based on convolutional neural network |
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